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Summary

TURBOSTOP is a revolutionary Tundish Flow Control System designed to improve significantly both the quality of the steel produced during continuous casting and the predictability and reproduction of mixed grade casting practices.

Description

The flow control system is based on Foseco Steel’s patented TURBOSTOP turbulence suppressor, used in conjunction with Foseco’s complementary range of tundish furniture including FOSCAST dams, weirs and baffles. Individual systems are designed to meet specific customer requirements using Foseco Steel’s extensive Water Modelling facilities, which simulate both steady state casting and ladle change practices, to ensure that optimum performance is achieved.

Application

TURBOSTOP is installed in the tundish during re-lining, and positioned to be beneath the pouring stream during casting. Best results are obtained by ensuring that the ladle stream is central, but TURBOSTOP can be specially designed to eliminate the effect of off-centre casting.

Function

TURBOSTOP works by dampening the energy of the incoming stream, thus suppressing turbulence in the pour area. The resultant upward flow eliminates short-circuiting of the steel through the tundish, giving a more controlled steel flow with a uniform, lower velocity profile and increased level of \'plug flow\'.

Benefits

	Initial splash is reduced, giving improved safety and working conditions.
	Faster filling of the tundish can be achieved, improving starting performance and initial cleanliness.
	Permanent lining is increased by reducing wear on tundish refractories in the pour area.
	Plug flow is increased, reducing dead volume and improving temperature homogenisation.
	Residence time is extended, giving improved inclusion float out and reduced nozzle blockage, resulting in cleaner steel.
	Turbulence, reoxidation and slag entrapment are reduced, improving steel cleanliness.
	Steady state conditions are quickly re-established after ladle change, reducing downgrade and thereby improving steel yield.
	More predictable grade change chemistry reduces steel scrap and downgrade.